#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>


int main()
{
    int ret = -1;
    ret = open("./linux84",O_RDWR|O_CREAT,0664);
    if(ret<0){
        return -1;
    }
    printf("file oper ret = %d\n",ret);
    while(1){
        sleep(1);
    }
    return 0;
}